the maximum HSA for you in 2024 is 4150 * 10/12=3458.33. (The 3400 the employer cited is the proration for the year). This includes both employee and any matching employer contributions. to contribute to an HSA for any month you must be covered by a HDHP on the first day of that month. your first month of eligibility is March
assuming you will get 20 paychecks in 2024 from which HSA will be deducted and there are no matching employer contributions contributing $170 per pay period is fine. However, if the employer is going to make a matching contribution 170 would be too much. so ask your employer.
