Invited to a meeting where I will receive a postdoc offer, what should I discuss/prepare the meeting? I had a postdoc (field is computer science) interview 2 weeks ago. The HR team told me that the panel is willing to offer me the position and want to discuss the details in a 30mins Zoom meeting. This is a first one for me, I really don't know what can I expect during this meeting and what can I bring into the discussion. I am also a coming from outside the UK (need a visa).

Salary negotiation
Benefits
other elements?

Since I need a visa sponsorship

Visa procedure
Will the university cover immigration fees?

Basically, what are the key elements that form the typical start-up package for a postdoc job offer?
PS: I am having the meeting with one HR member and not the PIs.
Read the agreement between your university and the union (presumably UCU) if applicable.  It's boring.  This defines what you can request.
Read benefits information on the HR website.
Read visa rules on the government website.
Figure out your preferred start date.
Estimate your relocation costs.
Find out what local taxes are.
Find out local housing costs from a regional housing website.  (In the UK they are often unreasonably high.)
Make a list of questions to ask.  Questions should demonstrate that you are genuinely interested in the position. They are not negotiation.
Reread the job ad.  Some places will try to offer you a job you didn't apply for.

For a postdoc, it is not called a startup package.  If you ask for &quot;startup&quot;, people will think you don't understand what a postdoc is.
Unless you are an experienced negotiator, do not try to negotiate during a meeting.  Negotiate by email.  Get everything in writing.