How many credit cards can I have open at one time? How will closing a card impact my credit score?

There is no set amount that is right or too much. Most importantly, you want to have some open for a longer time and also keep utilization under 30%. Also, you want to keep the amount manageable for logging in to various portals and keeping on top of payment dates.

If you close a card, it may impact your score slightly for a short period of time, depending on other factors such as how many cards or type of credit you have and your utilization rate.