why am i being charged 89$ for my free tax return?

[rjs]

Only TurboTax Free Edition is free. The tag below your question shows that you are using TurboTax Deluxe, which is not free.

[mesquitebean]

It's possible you either chose the wrong edition, or perhaps you had to upgrade due to something in your return that Free Edition cannot handle.  The Free Edition is only for very simple returns--a Form 1040 with no additional forms/schedules other than Earned Income Credit, Child Tax Credit, and Student Loan Interest.

If you don't think you need Deluxe, and if you haven't already paid, you can downgrade to Free Edition (first FAQ below).  But if there's something that Free Edition cannot handle (see second FAQ below), it will ask you to upgrade again.

FAQ:  How to I downgrade to a lower priced version of TurboTax Online?

https://ttlc.intuit.com/turbotax-support/en-us/help-article/change-service-level/downgrade-lower-pri...

FAQ:  Why do I have to upgrade from Free Edition?
https://ttlc.intuit.com/turbotax-support/en-us/help-article/change-service-level/upgrade-free-editio...