Can my accounts be merged?

FYI, in case it applies to your situation:

Another Rockstar, @RoHe, helpfully found this in the Dell Rewards FAQs:

Dell Rewards accounts are unique to individual email addresses and cannot be combined or transferred. To redeem Rewards earned by multiple accounts, individual account information can be entered at checkout, and a maximum of three forms of payment is allowed for any given order. Dell reserves the right to reject requests for consolidation of any Dell promotional codes or Rewards at its own discretion for any reason.

And, the FAQs also say this:

Rewards expire 90 days from the issue date. Rewards that have expired will be deducted from your total Rewards balance. Expiration date can be found by visiting your Dell.com My Account and clicking “view rewards details.” Expiration dates cannot be extended.

So, if your rewards are more than 90 days old, then the question of applying them to your new account is moot.

I will let you know if I learn anything further.