Apply for a business credit card now that the file and payment history support it.
A card is a revolving tradeline that deepens the profile — earned by the history, not bought ahead of it.
Apply with the entity's details; prefer cards that report to business bureaus and minimize personal guarantee where possible.
Source: Issuing bank + the three business bureaus
Underwriting, once the file supports it
This is general business-credit education, not financial, legal, or tax advice. Confirm specifics with a licensed professional and the official sources directly.