Hello there, Alex. It's great to have you posting your concern here in the QuickBooks Community.
When importing estimate transactions using an IIF and CSV file to QuickBooks Online (QBO), the option to import them is currently unavailable. However, we can enter them manually or use a third-party app that you can utilize as a workaround.
To help you look for a third-party app, here's how:
- Go to the QuickBooks Apps Store.
- From the search bar, enter a keyword of the feature you need. Example: Remittance advice.
- Select the app you want to use.
Moreover, when a customer accepts your estimates, you can convert them into an invoice and process their payments.
Keep us posted if you need additional assistance with estimates. The Community is always here to help. Keep safe!
