Zoho Sign now offers an integration with Zoho Inventory. Users can now digitally sign invoices before sending them to customers. This allows businesses to swiftly generate legally compliant tax invoices using Zoho Sign and manage the signed copies online in a secure cloud storage. 

You may also record each signing and invoiced transaction in the Ethereum public blockchain with Zoho Sign's blockchain timestamping feature, and download complete audit trails and certificates of completion for audit and accounting purposes.