How can I determine how to file long term disability payments where I paid post tax premiums but my employer paid a portion? As well as ssdi payments

What tax document did they put the disability on?   Is it on a W-2 or a 1099?

For the Social Security disability:

 Go to Federal> Wages & Income>>Retirement Plans and Social Security  (SSA1099 and 1099RRB) to enter your SSA1099.