Hi there!
First, you can check your account activity here: https://ttlc.intuit.com/questions/3996673 That will allow you to see when your account was accessed and on what devices.
Second, if you suspect tax fraud or are concerned about the safety of your account, read through this FAQ: https://ttlc.intuit.com/questions/1900655 There are details on how to contact us and what action steps you can take. Please note: Since today is the filing deadline, phone support may have a longer wait time.
Finally, and please forgive me if this is a silly request, if you have an ebay account, you could also check that and just make sure there wasn't a charge made through your ebay account.
Let me know if you have further questions!
