i sympathized with you because MAGI can differ depending on what tax issue is being considered. so for what purpose are you trying to compute MAGI
se health insurance is not dependent on MAGI
it's limited to net self-employment income reduced by contributions to self-employment retirement plans and 1/2 of the SE tax. as you can see this has no relation to AGI or MAGI. other limitations may apply if you are eligible to participate in any subsidized health plan maintained by any employer (other than yourself) of you, your spouse, your dependents or any child under 27. it ca be even more complicated idf you had obamacare
the taxable portion of social security is computed as follows assuming that you did not make an IRA contribution which is subject to phaseout
1) amount from all SSA-1099s box 5
2) 1/2 of 1
3) total of 1040 lines 1, 2b 3b,4b, 5b , 7 and 8
4) amount if any from 1040 line 2a
5) add 2, 3 and 4
6) the total of amounts from 1040 line 10b, schedule 1 lines 10 though 19 + any write in adjustment entered on the dotted line next to
