Taxes: Rental Income Loss in 2019 , disqualification for 2020?

[John Smith]

I purchased an investment property in October 2019, got tenant in for November 2019. ~$1800/month. 

I can report a loss ~($3500) or more on my 2019 taxes due to deductions/interest/depreciation, etc.  Will this hurt my Debt to income Ratio and lower my chances of getting another investment mortgage in 2020? Will the Underwriter disqualify the income from my investment property and say I can't use the rental income to help my DIT Ratio? 

Current:

Monthly Income: $6,600

Debt: Primary House Mortgage/ins/taxes: $1400

Debt: 1st Investment Property Mortgage/ins/taxes: $1400    

DTI: 42%