Estimates are called Quotes in my country. How do I change its name in Zoho Books?

You can edit the title from ‘Estimate’ to ‘Quote’ or vice-versa easily by performing the following steps:

• Click on the Gear icon on the top right corner.

• Navigate to Templates -> Estimates.

• Click on Header & Document Information.

• Edit the Document Title column from Estimate to a text of your choice(Eg: Quote).
  

• Click Save for the changes to take effect.