Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to access the 179d tax credit for energy efficient construction [title] Make sure you're in the right position to qualify. [step] Firstly you have to be a property owner, tenant, architect or an engineer who intends to carry out energy efficient improvements to a property or has already done so. [title] Find a reputable tax services company.

Ending1: [step] As soon as possible, check with them for references. If possible, search online for occupancy references. Ending2: [step] Ensure this entity will gain permission to use your property, and conduct business in the county where you're located. [title] Obtain a business identification number (ein). Ending3: [step] You can find exceptional companies on the internet subject to a few verifications and cross checks. You will need to subject your choice to the usual verification process that is required for online companies. Ending4: [step] A list of qualified tax services providers will help you find the right company. [title] Ask your government or building department where the business is located and ask them to give you their telephone number.

Answer format: ending1/ending2/ending3/ending4