Heard about that new Schedule M form that will give you a $400 break on your taxes if you qualify? Neither had we, but luckily CBS Money Watch posted a reminder today.

Single-payers making less than $75k per year (and married couples filing jointly making less than $150k) have been receiving a reduced payroll tax this year and last as part of the Making Work Pay provision of the federal stimulus. Since this reduces your 2009 taxes by $400 if you’re single or $800 if you’re married/file jointly, you have to claim the credit on your 2009 tax return.

And if you've already filed your taxes without submitting a Schedule M, we hear the IRS has been sending incorrect forms back to filers, or making the corrections themselves. (A friend of SFist checked her form online and saw that the IRS had made the correction for her.)