I used the free version but why it charges me 20.99

Hello @wawadudu789-gmai, thanks for your post.

If you have a simple tax return, TurboTax Online in Canada is free to users.

Here are the common scenarios which are possible to do with TurboTax for free:

• Employment income 
• Unemployment income
• T4RIF income  
• Pension income
• RRSP contributions 
• Child care expenses 
• Dependent credits 
• Tuition 
• Caregiver tax credit 
• COVID-19 benefits & re-payments

However, if you have additional scenarios, or need to fill out additional forms for your return, you may need to pay in order to file via TurboTax.

Here's a link to our Pricing page, which allows you to See Pricing for TurboTax for your particular situation.

Hopefully this helps you to get a better understanding on why you might be charged for the use of TurboTax.