You surely can do a practice return. Included for your convenience is information on getting that done.

https://ttlc.intuit.com/replies/3301417

Can I do practice run on taxes to see my refund 

Please check the link below for information on how to create a test return.

How to make a test copy of your return - Community

Can I do a practice return 

Need practice return 

Yes, you can do a practice return. Please check the link below for information on how to create a test return.

 How to make a test copy of your return - Community

Yes 

@Valeryanthony97 You only posted one word--"yes" -- to a thread that has had no activity since April 2020, so we cannot be sure what you are saying yes to.   But if you are asking about starting a 2022 tax return, the online software for 2022 returns will not be available until early December.  Meanwhile you can try using the TaxCaster tool for an estimate.

https://turbotax.intuit.com/tax-tools/calculators/taxcaster/

Yes hello I'll like to do a practice test first to see my refund 

@Kmbrl69 You can do that......but do not go so far into the program that you pay or file it by accident.

With Turbotax Online you do not pay until you are ready to file.

so until you are satisfied it is all practice.

Need a practice return 

You can use the Online version.  Just don't pay or file.  I have several test accounts in the Online version.

Online is only good for 1 return per account.  But you can use the same email address for 5 accounts.   How to start another return in the Online version

https://ttlc.intuit.com/community/using-turbotax/help/how-do-i-start-another-return-in-turbotax-onli...