Since I do not know your exact situation, I can only say that sometimes a rollover does not trigger a taxable event and other times it does. The 3 links below may help clarify for you and then you can apply the correct answer to your event:
Rollovers of Retirement Plan and IRA Distributions | Internal Revenue Service (irs.gov)
The 60-Day Rollover Rule for Retirement Plans (investopedia.com)
Can I Do Monthly Rollovers From My 457 to an IRA? (zacks.com)
