Question

Im not with my husband anymore and i have no clue what his income is

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File using the status "Married filing separately"

Starting in the My Info section, TurboTax will walk you through filing a married filing separate return.

Additional resources for you:

You will still need to enter his name and social security number. If you do not have access to your 2018 taxes, you could get this by going to IRS get transcripts.
The tax rules are that you must both file the same way for your deductions, both itemizing or both claiming the standard deduction.
If you filed married filing jointly last year, for finding Adjusted Gross Income to report for 2018 to e-file your 2019 tax return.