How to get another job when you have already accepted a different job in the future?

So I recently did an audit internship at a Big four accounting firm and I got the job offer but a year from now. I wanted to get another internship or job in accounting for the year that I don’t start my job at the big four.

The problem is that every interview I go to they ask me if I received an offer to work at the big four and I never know what to say?

Like if I say I have no offer, they will think that I’m horrible and didn’t receive an offer or they will know I’m lying and got an offer. If I say I received the offer and didn’t accept yet then they still won’t hire me!

Now I’m thinking to lie all together and say I received an offer but declined it. What do I do?

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