Income went up and you want more going into the policy. There are three ways to do it and they're not interchangeable.
The first is the paid-up additions rider, if your contract has one with room left. Most well-designed policies have a scheduled PUA amount and a maximum, and if you've been funding below the maximum you can move up toward it. This is the cleanest option, since there's no new underwriting and no new contract, and the extra dollars go almost entirely to cash value. Call the carrier or your agent and ask what your current PUA schedule allows.
The second is a lump sum into the rider, which many contracts permit annually within limits. Useful for a bonus or a commission year, and it doesn't commit you to a higher ongoing payment. Some carriers require the scheduled premium to be current first, and some have a window each year when they'll accept it.
The third is a second policy. Buy a second policy. That's the move when the first one is at its funding ceiling, and it's often better anyway. A new contract gets its own base, its own room for paid-up additions, and its own crediting history starting now. It also means new underwriting, and your health today is not your health at issue.
Underneath all three sits the limit that decides everything: the MEC line. There's a ceiling on how much you can put into a given death benefit over a given stretch of time. Go past it and the IRS calls the contract a modified endowment contract, a MEC. From then on loans and withdrawals get taxed, and a 10% penalty can apply before age 59 and a half. Your carrier tracks this and will refuse or refund an overpayment, but don't rely on that. Ask for the maximum non-MEC premium before you send the money.
If you want more room inside the policy you already have, the other lever is raising the base death benefit. That lifts the MEC limit. It also lifts your cost of insurance. That's a design conversation rather than a form you fill out, and it's the one I'd want to have before a bonus lands rather than the week after.