Taxpayers should know and understand their correct filing status 

https://www.irs.gov/newsroom/taxpayer

https://accountinginstruction.info/

Taxpayers need to know their correct filing status and be familiar with each option.  Generally, the taxpayer's filing status depends on whether they are single or married on Dec. 31 and that determines their status for the whole year. However, more than one filing status may apply in certain situations. If this is the case, taxpayers can usually choose the filing status that allows them to pay the least amount of tax.