I went into my contacts and now I can't get back to my inbox display screen.

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Hi,
can you see the “Mail” header in the left pane? If so, click on it and you should get to Inbox. If you cannot see the Mail header, right click on the “Contacts” and tick “Mail”. Hope it helps.

I right-clicked on Contacts and selected “Mail”.  This did the trick.  Many thanks!!