Meera registered for tax in month three.

She added the tax rate, created an invoice, checked the calculation, and sent it.

Then the client's accounts team replied:

Where is your registration number?

The tax was correct. The invoice still needed some work.

The Usual Way To Do This  

The common setup is covered in our Taxes FAQ, with more details under Taxes.

Start by configuring the tax that applies to your business.

1. Go to Settings → Taxes.

2. Add the tax you collect, along with the applicable rate.

3. If your edition asks for your tax registration details, enter your registration number and the other required information.

4. Save the changes.

5. Create a test invoice, select the tax, and check the calculation before sending it to a customer.

Once the basics are in place, you do not have to work out the tax manually every time you create an invoice.

But getting the calculation right is only one part of the job. Your customer may also need to see the right tax information on the invoice.

You May Be Facing One Of These:  

• My tax calculates correctly, but my registration number is missing

• My country calls it VAT or GST instead of Tax

• My tax-inclusive price is coming out wrong

• My customer needs more tax information on each line

My tax calculates correctly, but my registration number is missing

This is a useful distinction:

Calculating the tax and displaying your tax information on the PDF are not always the same job.

First, make sure the registration information itself is saved correctly.

1. Go to Settings → Taxes.

2. Check your tax registration details.

3. Make sure the registration number is complete and correct.

4. Save the changes.

If the information is saved but still does not appear on the invoice, check the PDF template.

1. Go to Settings → General Preferences→ Organization Address Format.

2. Click on Insert Placeholders to add the Tax Label & Tax Number Placeholders.

3. Save and preview an invoice.

See Templates FAQ for the available customization options.

A simple way to remember this:

Tax settings = What your tax information is

PDF template = What your customer sees

So if the tax calculates correctly but something is missing from the PDF, the template is the next place to look.

My country calls it VAT or GST instead of Tax

Depending on your country, you may be working with GST, VAT, Sales Tax, or another tax system.

Start with the tax itself.

1. Go to Settings → Taxes.

2. Review the taxes configured for your organization.

3. Make sure you are using the appropriate tax name and rate for your business.

4. Save the changes.

5. Create a test invoice and check how the tax appears.

If the calculation is right but you want to change how a label appears on the PDF:

1. Go to Settings → General Preferences→ Organization Address Format.

2. Type in the Tax Label that's appropriate in your country.

3. Save and preview an invoice.

The important thing is consistency.

If you call it GST in your setup, your invoice should not leave your customer wondering why another part of the document says something different.

My tax-inclusive price is coming out wrong

First, check whether the price you entered already includes tax.

For example, suppose you sell something for 100, and that 100 already includes the tax.

If the invoice treats 100 as the amount before tax, it will calculate tax on top of it — giving you a higher total than you expected.

So start with the transaction:

1. Create or edit the invoice.

2. Add your item and enter its rate.

3. Check whether the transaction is set to treat the amount as Tax Inclusive or Tax Exclusive.

4. Select the appropriate treatment.

5. Check the subtotal, tax amount, and final total before saving.

A quick example:

Tax Exclusive

Amount: 100
Tax at 10%: 10
Total: 110

Tax Inclusive

Total selling price: 100
Tax is already included within that 100.

If you expect the customer to pay 100 but the invoice becomes 110, this is one of the first settings worth checking.

Once you have it right, create a simple test invoice before using the setup for real customers.

And if you are unsure whether your prices should be tax inclusive or exclusive for your business, confirm the treatment with your accountant or tax professional.

My customer needs more tax information on each line

Sometimes showing a tax total at the bottom of the invoice is not enough.

Your customer may want to understand the tax applied to each item separately.

Start by checking what your invoice currently displays.

1. Go to Settings → PDF Templates → Invoices.

2. Edit the template you use.

3. Open the section that controls the item table.

4. Enable the tax-related columns available.

5. Save and preview the invoice.

One small warning: every new column takes up space.

If you add several tax fields to an already busy invoice, the table can become cramped or move onto another page. If that happens, remove unnecessary columns or revisit the template layout.

On your phone: Once your taxes, registration details, and PDF template are configured, creating invoices from your phone becomes much easier. The important part is getting those organization-level defaults right first, so you are not fixing the same tax information on every invoice.

If It Still Is Not Right  

Work through these in order:

1. Check the calculation. Is the correct tax and rate being applied?

2. Check your registration information. Is the number saved correctly under your tax settings?

3. Check the PDF template. If the information is saved but missing from the document, make sure the relevant field is displayed.

4. Check the customer's tax treatment. If the problem happens only for one customer, compare their setup with a customer whose invoice works correctly.

5. Check inclusive vs. exclusive. If the final amount looks unexpectedly high or low, check whether tax is already included in the price.

6. Create a fresh test invoice. This gives you a clean way to check the setup after making changes.

If you still need help, send support@zohoinvoice.com the invoice number, a copy of the PDF, and a simple example of what you expected.

For example:

Amount: 100 → Tax: 10 → Expected total: 110

Or:

Registration number is saved in Settings → Expected it to appear below the organization address → Missing from PDF

That little bit of context can save a round of questions.

Over To You  

Did your tax invoice come out correctly the first time?

Or, like Meera, did a customer point out the one detail you had missed?