Take each state and divide by the total. Take the MA income and divide it by your total income. Multiply that percentage times the total of each category.
For example:
- You earned $10,000 in MA and $40,000 total on all W2s.
- ($40,000 total - $10,000 MA = $30,000 non-MA income - see more below)
- $10,000 MA divided by $40,000 total equals 25%.
- Add up all the Medicare on all W2 forms.
- Multiple the total Medicare by 25%,
- Add up all the Social Security on all W2 forms
- Multiply Social Security by 25% and so on.
- Keep adding and multiplying as needed
If you need it the other way around, you can do the non-MA
- $30,000 non MA divided by $40,000 total equals 75%.
- Add up all the Medicare on all W2 forms.
- Multiple the total Medicare by 75%,
- Add up all the Social Security on all W2 forms
- Multiply Social Security by 75% and so on.
- Keep adding and multiplying
If all income on the W2 was MA, no math required. Just look at the form.
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