Foreign Residential Rental Property

I recently acquired residential rental property in Germany. Rental depreciation in Germany for tax filing is different from that in the US. I had a loss in 2024, can I offset that loss against income on my US tax return or must I wait until I have income from that rental and offset it against that? Also, what is the depreciable life? I have heard different numbers; some say the home must be depreciated over 30 years, and some say say should be depreciated over 40 years. Which is correct?

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