I have my own account on my details and also working on my client account.
Will it make any issue of linked account?
You can register as an individual as well.
Yes, you can use your own personal or business details to register with the Solution Provider Portal (SPP), even if you’re also working on a client’s Amazon account, as long as you’re not violating any Amazon policies like operating multiple selling accounts without approval. Registering as a service provider through SPP is different from owning multiple seller accounts, it’s meant for offering services to other sellers. That said, always keep a clean separation between your service provider role and seller activity, avoid any policy violations, and make sure you’re not using the same devices, IPs, or browsers across unrelated seller accounts, as Amazon may still track and flag those as linked if they suspect cross-account influence.