All of the wages and most of the bonuses you have mentioned appear to have a NY nexus and therefore are NY sourced and NY taxable (see breakdown below).
You would be able to claim a credit on your NY taxes to mitigate the double taxation on the CT nonresident income for days actually worked in CT. You should work the CT nonresident return before the NY return. Allocate to CT by using days worked in CT divided by total working days for the employer. Take note of the income taxed and the CT tax liability as those will be used to calculate the NY credit for taxes paid to another state.
Note: If another state taxed the bonus received in Mar for working in that state in 2022, work that nonresident state return before NY as well. You will include that income taxed and tax liability in the calculation for the credit for taxes paid to another state.
Jan - 31 Aug - Lived and worked in NY (NY resident all wages no matter where earned) Credit for taxes paid to CT for CT days
Mar - Bonus received (Resident NY)
Dec - Only the part of bonus derived from the working days in NY divided by total working days for the employer (nonresident NY sourced)
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