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QuickBooks Self-Employed (QBSE) helps you submit your Quarterly Tax Payments. For annual tax returns, you'll need TurboTax Self-Employed so you can prepare and file them.
To pay your Federal Estimated Quarterly taxes via mail:
Other options you have can be found in this article: Pay Federal Estimated Quarterly Taxes. This includes steps on how you can make the payment online.
As for your annual taxes, you can take a look at this article instead: QuickBooks Self-Employed - Annual taxes guide. It includes a checklist so you can ensure you don't miss any tasks.
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