Yes.
The IRS considers you covered by an employer's plan if you were covered at any time during the tax year.
According to the IRS:
"You’re covered by an employer retirement plan for a tax year
if your employer (or your spouse’s employer) has a:
- Defined
contribution plan (profit-sharing, 401(k), stock bonus and money purchase
pension plan) and any contributions or forfeitures were allocated to your
account for the plan year ending with or within the tax year;
- IRA-based
plan (SEP, SARSEP or SIMPLE IRA plan) and you had an amount contributed to
your IRA for the plan year that ends with or within the tax year; or
- Defined
benefit plan (pension plan that pays a retirement benefit spelled out in
the plan) and you are eligible to participate for the plan year ending
with or within the tax year."
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