If it's asking for an EIN number you are entering it in the wrong place. There is no EIN on social security SSA-1099.
If you only get ssi or SS or SSDI it is not taxable and you do not have to file a return.
Try going to the search box and type in SSA-1099 or Social Security Benefits. That will give you a Jump To link to take you directly to it.
OR
Enter a SSA-1099, SSA-1099-SM or RRB-1099 under
Federal Taxes on the left side or top
Wages and Income
Then scroll down to Retirement Plans and Social Security
Then the second line - Social Security (SSA-1099. RRB-1099) - click the Start or Revisit button
Up to 85% of Social Security becomes taxable when all your other income plus 1/2 your social security, reaches:
Married Filing Jointly: $32,000
Single or head of household: $25,000
Married Filing Separately: 0
You do not enter a Form SSA-1099 in the W-2 section for wages.
To enter Social Security benefits reported on form SSA-1099
Or enter ssa-1099 in the Search box located in the upper right of the program screen. Click on Jump to ssa-1099
There have been no other questions posted here under your username julia-thompson97 since you asked some quesitions in 2019.
If your ONLY income has been Social Security you do not need to file a tax return. Do you have some other question about that?
If you are trying to enter a SSA1099 it sounds like you are in the wrong place. You do not enter it as a W-2.
Do not try to enter your SSA1099 or RR1099RB as a W-2. Go to Federal> Wages & Income>>Retirement Plans and Social Security (SSA1099 and 1099RRB) to enter your SSA1099.