I paid Q1 through irs.gov. How can I input that manually?

Hello there, @dvbe589465.

Let me show you how to record the estimated tax payment in QuickBooks Self-Employed (QBSE). 

If the bank account you're using to pay the tax is connected to your QBSE account, then there's no need to manually record the tax payment. You'll just want to categorize it as a tax payment when it downloads.

However, if the bank account is not connected to online banking, here's what you'll need to do:

1. In the left menu, click Transactions.
2. Click the Add transactions button.
3. Set the payment date. 
4. In the description field. enter something like "Tax payment." 
5. Enter the amount. 
6. Click Select a category, choose Taxes, then select Estimated Taxes.
7. Click Save when done. 

For more information about the process, see this article: Pay federal estimated quarterly taxes in QuickBooks Self-Employed.

Feel free to click the Reply button if you have further questions. I'll be more than happy to answer it for you. Have a great day.