You can create quotes in different currency only if you have the
multi-currency feature activated in your account. Note that this feature
is available only in the Enterprise Edition. See Also Multi-Currency. Note that, if the multi-currency feature is enabled, the Currency Locale will not be available under Setup > OrganizationSettings > CompanyDetails.
For users who do not have the Enterprise Edition, you can use only one
currency throughout your CRM account which is based on the Currency
Locale that you select.
To change the currency
Log in to Zoho CRM with Administrator privilege.
Go to Setup > Admin Settings > Company Details.
In the Company Details page, click Edit.
Under Local Information section, select the country form the Currency Local list.
Note: The Company Details link will not be available for single-user accounts (personal account). In that case, you can change the Currency Locale in the Account Information page.