Your "mate" ? Are you legally married? If so you cannot claim a spouse as a dependent, but you can file a joint return together.
Look at your Form 1040. The dependents are shown on the top half of page 1.
Click on Tax Tools on the left side of the screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.
Not legally narried no an i dont remember if i claimed him as a dependent or not but i was helpin him with filling out for the stimulus payment an it asks if anyone claimed him i cant seem to assess my 2019 tax records on here