Dual-status return - 1040/1040NR - Married filing jointly, and, separately

Hi Team,

 

I hope all are well.

 

I have a general question with respect to returns as a first year dual-status alien. My accountant has  advised to file my 1040 as "married filing jointly", and my 1040-NR as "married filing separately", given that part of the year was spent residing abroad. Generally speaking, is it correct to file in  this regard and to send both to the IRS, or, must it be one or the other (I appreciate 1040-NR cannot be filed jointly)?

 

Many thanks.