Can I add my spouse as a dependent, she was unemployed 2019?

[xmasbaby0]

No.  You never claim a spouse as a dependent.  You file a joint return. 

Married Filing Jointly is usually better, even if one spouse had little or no income. When you file a joint return, you and your spouse will get the married filing jointly standard deduction of $24,400 (+$1300 for each spouse 65 or older)  You are eligible for more credits including education credits, earned income credit, child and dependent care credit, and a larger income limit to receive the child tax credit.

[12Luckey]

is it to late or can I refill adding my wife as a dependent 

[xmasbaby0]

@12Luckey You can never claim a spouse as a dependent.  You do not say how you filed--did you file separate returns?  You should have filed a joint return if you were legally married as of the end of 2019.  That way, you get the married joint standard deduction of $24,400 (+ $1300 for each spouse 65 or older).  How did you file?