Form 4562 is only required if you are placing new assets into service during the tax year, if you are taking a Section 179 deduction, or if you have "listed property" you are depreciating. Otherwise, you establish the class life, depreciation method, and convention used on the Form 4562 in the year you place it in service and then in subsequent years you just calculate the depreciation deduction on the relevant form, such as Schedule E in your case. Once you tell the IRS it is 27.5 year property, placed it in service in June, and are using the mid-month convention, that will not change so they know how you will calculate it in future years.
If you do end up placing more depreciable assets in service in subsequent years, you will once again have to file a form 4562. In that case, there will be a line on that form to list the total amount of MACRS depreciation you are deducting for assets placed in service in prior years. This is so you can add that to the current year's depreciation for new items and then carry the total depreciation deduction to the relevant form.
The IRS publishes a depreciation worksheet that can be very helpful in keeping track of your depreciable assets It is in the instructions to form 4562 which you can find on page 22 here:
http://www.irs.gov/pub/irs-pdf/i4562.pdf
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