If you are married but filing separately and have been separated for a few years and dont know your spoces VAGI, can you put 0?

If you are legally separated as of the last day of the year then you can file as single.

 

If you are married but didn't live with your spouse for the last half of the year and you have a qualifying child you can file as head of household.

 

If you must file married filing separately and you do not know your spouse's AGI and can't get it from them then yes, you should enter zero.

 

Here is more information on Married Filing Separately

The only time you are asked about your spouse's AGI if filing separately should be the premium tax credit.  You can only claim the PTC when married filing separately if you are separated due to abuse or spousal abandonment.  See here,

https://www.irs.gov/affordable-care-act/individuals-and-families/questions-and-answers-on-the-premium-tax-credit

 

Are you asking about a Canadian tax return?  The Canadian support site is here,

https://turbotax.community.intuit.ca/community/turbotax-support/help/03/en-ca

---

@RobertB4444 wrote:

If you are legally separated as of the last day of the year then you can file as single.

 

If you are married but didn't live with your spouse for the last half of the year and you have a qualifying child you can file as head of household.

 

If you must file married filing separately and you do not know your spouse's AGI and can't get it from them then yes, you should enter zero.

 

 

---

"If you are legally separated as of the last day of the year then you can file as single."

 

This is difficult.  You must be "

Legally separated from your spouse under a divorce or separate maintenance decree" 

according

 to state law.  I have never actually seen an example of a state law where the IRS 

accepted

 legal 

separation

 as being equal to unmarried (for example, if the law allows you to reconcile, no matter how 

unlikely

, you 

aren't

 "

unmarried" for tax purposes)

.  Certainly it is not allowed 

for

 NY and NJ, which I researched extensively.  Before 

you

 file as single if you are 

still

 legally married, check with a professional 

tax

 

accountant

 in your state.   

 

"If you must file married filing separately and you do not know your spouse's AGI and can't get it from them then yes, you should enter zero."

 

The only time the IRS will ask for 

your

 

spouse's AGI when filing separately (MFS) is for the premium tax credit, but the PTC is disallowed for MFS unless the spouse is a victim of domestic violence or spousal abandonment.

 

The customer may be asking about a Canadian tax return.